Bulletin: April 2004
U.S. DEPARTMENT OF THE INTERIOR NO. 4-04-EXP GEOLOGICAL SURVEY MAY 28, 2004 ROUTINE MINING SEISMICITY IN THE UNITED STATES APRIL 2004 ORIGIN TIME GEOGRAPHIC DEPTH MAGNITUDE Q SD GAP NO. F-E REGION, CONTRIBUTED MAGNITUDES AND COMMENTS UTC COORDINATES GS STA DAY HR MN SEC LAT LONG mb MS USED 06 18 11 36.8* 43.778 N 105.249 W 0 G B 0.7 179 7 WYOMING. ML 2.8 (GS). 60 km (40 miles) SSE of Gillette. 09 18 57 45.7 43.767 N 105.328 W 0 G A 0.9 123 14 WYOMING. ML 3.1 (GS). 60 km (35 miles) SSE of Gillette. 13 18 03 17.2 43.830 N 105.264 W 0 G A 0.7 94 10 WYOMING. ML 3.5 (GS). 55 km (35 miles) SSE of Gillette. 16 18 07 44.1 43.710 N 105.151 W 0 G A 1.1 122 12 WYOMING. ML 3.2 (GS). 70 km (45 miles) SSE of Gillette. 18 18 04 04.5 43.646 N 105.226 W 0 G A 0.7 123 17 WYOMING. ML 3.1 (GS). 75 km (50 miles) SSE of Gillette. 19 18 02 08.4 43.812 N 105.257 W 0 G A 0.7 113 22 WYOMING. ML 3.2 (GS). 55 km (35 miles) SSE of Gillette. 22 22 20 32.6 41.227 N 117.432 W 0 G A 1.3 85 11 NEVADA. ML 2.4 (GS). ML 2.4 (GS). 40 km (25 miles) NE of Winnemucca. 23 00 40 07.9 43.728 N 105.178 W 0 G A 1.0 120 14 WYOMING. ML 3.0 (GS). 70 km (40 miles) SSE of Gillette. 23 21 11 49.7 43.771 N 105.272 W 0 G A 0.6 123 15 WYOMING. ML 3.5 (GS). 60 km (40 miles) SSE of Gillette. 23 23 07 11.9 43.782 N 105.521 W 0 G A 1.2 107 16 WYOMING. ML 2.9 (GS). 55 km (35 miles) S of Gillette. 24 18 05 58.1 43.810 N 105.241 W 0 G A 0.8 112 34 WYOMING. ML 3.5 (GS). 60 km (35 miles) SSE of Gillette.
For origin times after September 30, 2002, USGS computations of hypocenters and magnitudes for routine mining events are listed in this publication only for exceptionally large events and for events that are also listed in the Reviewed Event Event Bulletins (REB) of the International Data Center of the United Nations' Comprehensive Nuclear-Test-Ban Treaty Organization.
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